Magneto electric generator rotor and an implement for removing this rotor

ABSTRACT

By inserting a male screw for fixing a ratchet claw into a nut placed on an insert core and the like to prevent rotation, it is possible to eliminate additional screw processing on the insert core, to increase magnetic resistance between a magnet and the insert core provided with the former, to concentrate irradiation of magnetic flux from the second magnet pole toward outside and to fix the magnet and the second magnet pole onto the insert core with screws. Further, by tapering an axial hole of the rotor, it is possible to easily and accurately attach the insert core or the rotor to a crankshaft. Furthermore, by inserting a removal parts of a removal tool into a perforation hole of the rotor, it is possible to realize quick and simple removal of the rotor from the crankshaft.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a magneto electric generator rotor used in aninternal combustion engine spark plug and an implement for removing thisrotor.

2. Explanation of Prior Art

FIGS. 45 and 46 show a broken down section of a small size engine usedin a conventional operating machine In said figures numeral I is a smallsize engine, 1 is a cylinder for said engine 1, and 13 is a connectingrod supporting a piston that moves in this cylinder 12 Also, 14 is acrankshaft for eccentric driving the end of said con rod 13, and 15 is anut to fix rotor B attached to the end of this crankshaft 14.

One side of said rotor B that is on the opposite side of an axial holepart through which the crankshaft 14 is inserted through secures amagnet 2 and forms a pole piece part P together with a magnetic pole 3,while the other side is composed of an insert core 26 of a ferromagneticmaterial that becomes counter weight part 4. Further, a cooling fan andthe like is installed to this insert core 26 to form one body.

Numeral 6 is a non-magnetic material layer such as a synthetic resinlayer formed in a discoidal shape so as to cover said insert core 26.

On one hand 7 is a ratchet claw which is supported in a freely revolvingmanner to an axle part 8 having a hole 8a as a cylinder part. Also, asshown in FIG. 46, a male screw 10 is inserted through this axle part 8,and the tip of this male screw 10 is screwed into and fixed to femalescrew 27 which has been formed beforehand in said insert core 26.

Numeral 9 is a ratchet spring of which one end is fixed to said axlepart S, and the other end is fixed to said ratchet claw 7 and this givesa rotating force in one direction to the ratchet claw 7.

Also, a reel axle 29 is provided in one body so as to project into anoperating machine frame 28 opposite to said rotor B. A reel 16 havingcontinuously wound thereon a rope 17 is supported on this reel axle 29in a freely rotating manner. On to this reel 16 provided with anengagement part 30 which catches said ratchet claw 7 and gives arotating force to the reel 16.

A spiral spring 18 is installed in the periphery of said reel axle 29 toapply to said reel 16 a rotating force around this reel axle 29. 31 is awasher fixed to the end of the reel axle 29 by a screw 32 and serves asa protector to prevent the axle hole of the reel 16 from coming off ofthe reel axle 29. Moreover, the reel axle 29, the reel 16, the rope 17,the spiral spring 18. The engagement part 30, the ratchet claw 7 and thelike form a recoil starter.

Also, 19 is a coil unit formed a power generating coil, ignition coil,ignition control circuit and the like in one body with thermosetting orthermoplastic synthetic resin and is fixed to said cylinder 12 side.

20 is a plug cap connected to said coil unit 19 through a cable 33. Thisplug cap 90 is connected to a plug 21 next to the cylinder 12. 28 is theoperating machine frame housing an engine.

In a small size engine made of such a construction, the reel 16 rotatesby manually pulling the rope 17 wound on this reel 16, and theengagement part 30 installed on said reel 16 catches on the ratchet claw7 on rotor B which has a magnet 2 buried in the insert core 26, androtates rotor B.

In this way, because said rotor B is attached to the crankshaft 14 ofthe engine 1, the crankshaft 14 is driven to rotate by said rotor B andthe engine 1 is cranked up.

On one hand, at that time the magnetic flux of the magnet 2 attached tosaid rotor B interlinks with the coil unit 19 having an ignition controlcircuit fixed to the cylinder 12 side of said engine 1. Said coil} unit16 will thus generate a power output and this power output will besupplied to the ignition plug 2 through the cable 3 q and the plug cap20, and by this, the ignition plug 21 will generate a spark, ignite thegas mixture in the cylinder 12, and start up the engine 1.

Further, the fixing of the ratchet claw 7 described previously is doneby screwing in the axle part 8 supporting it in a ratable manner to theinsert core 26 of the male screw 10. For this reason the female screw 27conforming to the male screw 10 is machine tooled as aforementioned inthe said rotor B.

On one hand, the rotor shown in FIGS. 47 and 48 has been proposed in thepast as a rotor used in a magnetic power generating machine such as theone described above. This rotor B I is a rotor having a hole piece part44 with a magnet 42 on one side and an insert core 41 as a counterweight part 45 on the opposite side of an axial hole part 43 buried asan insert form within a synthetic resin (not shown). This rotor B1 isdescribed in, for example Japanese Utility Model Publication 1993-10526.

In this conventional rotor B I, the insert core 41 has been made into anintegrated unit with a rivet 47 riveting together layers of multiplemagnetic plates in multiple locations, and said axial hole part 43 is astraight hole with the diameter being equal in the direction of theaxle.

Also, of the 3 magnetic poles, 46, 46a and 46b forming the pole piece44, said magnet 42 is inserted in an open hole 49 formed in the centermagnetic pole 46, and both ends of the magnet protrude outward towardsthe axial fringe of each magnet pole 46, 46a and 46b.

In such insert core 41, the pole piece part 44 and the counter weightpart 45 are formed in one body, and because there is no need forassembly work and machine tooling after die casting the advantage of arelatively low cost is achieved.

On one hand, in the past, when removing the rotor of a magnetic powergenerator from the crankshaft 14 of an engine such as shown in FIG. 45,a pulley removing tool is used to remove the pulley attached to therotary axle.

FIG. 49 shows such a conventional pulley removing tool and a rotor B2 ofa magnetic power generator removed therewith. In said drawing, 14 is theengine crankshaft, and this crankshaft 14 is provided with an axial hole43 for rotor B2 having a magnet and counter weight and the like, andmade in a virtually circular form with a non-magnetic material.

Also, said rotor B2 is fixed to the crankshaft 14, so as not to come offfreely, with a nut 15 screwed on a male screw part 48 formed on thecrankshaft 14 end Moreover, F is a multiple bladed cooling fan installedalong the circuit direction of one side of the rotor B2.

On one hand 50 is a bolt attachment part on which a bolt 51 is screwedon at the center part and to both ends are connected arms 52 and 53through axle supports 54 and 55, and a disengagement claw 53a isinstalled on the tip of the arm 53.

With this pulley removing tool, first the disengagement claw 53a of eachof said arm 53 ends is disengaged at the inner surface of the outercircuit part of the rotor B2 that is pressed against the crankshaft 14and the tip of said bolt 15 is pressed against the tip of the crankshaft14.

Further, the nut 15 is removed from the male screw part 48 before andafter such operation, then said bolt 51 is screwed on the attachmentpart 50. With this, the arms 52 and 53 will be subjected to an axialdirected torque due to the screwing on power and change the position ofthe supporting axles 54 and 55 to the center, and the rotor B2, whichwas being held by the disengaging claw 53a, is removed in the axialdirection from the crankshaft 14.

FIG. 50 shows a conventional rotor removal tool and a rotor B2 of amagnetic power generator that is removed with said tool. In the drawing56 is multiple screw holes provided on the rotor B2 so as to passthrough both sides of said rotor.

Also, 57 is a male screw, whose tip can be screwed into the screw hole56. Said male screw 57 is screwed into a through hold 59 provided in aplate 58 and the male screw 57 is prevented from pass in through by ascrew head 57a.

On to said plate 58, a bolt 51 is screwed into its center part and it ispossible for the tip of the bolt to hit the tip of said crankshaft 14.

According to this removal tool, the tip of the male screw 57 is screwedinto said screw hole 56 in certain depth then said bolt 51 is screwedinto the plate 58 until the tip of the bolt 51 hits the end of thecrankshaft 14.

Then, while keeping said plate 58 in a position that is parallel to therotor B2, said bolt 51 is screwed in. By doing this, the power to removethe rotor B2 from the crankshaft 14 is provided to the rotor through themale screw 57 in the plate 58. For this reason the rotor B2 can besmoothly removed from the crankshaft 14.

However, with a rotor B of a conventional magnetic power generator suchas that shown in FIGS. 45 and 46, even at present when the nonprocessingof the rotor B has become advanced, but only the processing of the screw(female screw) 27, which is used for fixing said ratchet claw 7 cannotbe eliminated For this reason a reduction in cost could not be achieved.

Also, with a rotor using an insert core of layered magnetic plates andformed into an approximately circular shape with plastic, the processingof said screw for use in attaching the ratchet could not be carried outwithout performing special work such as inserting aluminum parts.

Also, because the axial hole part 43 is a straight hole in the rotor B Iof the conventional magnetic power generator shown in FIGS. 47 and 48,when assembling said axial hole part 43 to the crankshaft 14 of theinternal combustion engine, it is difficult to provide sufficientcohesive strength to both parts. Also, in order to provide sufficientcohesive strength to both parts, it is necessary to use a separatelyprepared cohesion aid tool.

Also, in order to provide sufficient cohesion strength to said axialhole part 43 and said rotor B I, said axial hole part 43 can be madeinto a tapered hole and tighten the bond between both parts. However, insaid layered insert core 41, the tapered hole will be terraced with eachlayer of the plate. For this reason the contact with said crankshaft 14will become shaky and the cohesion between both parts will be imperfect.

Further, because both ends of the magnet 42 protruded out (out of thethickness) in the axial fringe direction Z of each magnetic pole 46, themagnetic flux of said magnet 42 could not be sufficiently concentratedon magnetic pole 46. That is a part of the magnetic flux would leakoutside the magnetic pole 46 and will not reach the power generatingcoil and ignition coil. For this reason, the power generating capacityfor ignition and the like cannot be sufficiently generated.

Also, when using a layered insert core 41 in an attempt to sufficientlybring out the capacity of said magnet 42, it will be necessary toincrease the thickness of the layers which results in increase of weightof whole rotor. Also, in case the layered thickness is alteredpartially, the increase of initial cost accompanying the increased costfor press molds and the increase in the process steps and costs cannotbe avoided.

Further, it has been proposed that an insert core 41 be formed with amagnetic sintered alloy and said magnet introduced between the insertcore 41 and the magnetic pole on the support provided thereon. However,in this case it will be necessary to make the support fairly thick dueto the conditions for forming.

For this reason, this support will invite shortages in the magneticcircuit and the magnetic flux generation rate in said magnetic pole willdeteriorate, and the power generating capacity in said power generatingcoil and the like will also become inadequate.

Further, in the removal method for rotor B2 shown in FIG. 49, it will benecessary to disengage the disengaging claw 53 along the outer surfaceof the rotor B2. At present, when miniaturization of the magnetic powergenerator and engine is being aimed at, it is difficult to keep thespace required for such a disengagement claw 53 on the peripheral ofsaid rotor B2 and as a result such a pulley removal tool cannot bepractically used.

Also, in the removal method shown in FIG. 50, it is necessary to applyan additional process of a screw hole 3 S for the rotor obtained bymolding to the latter steps of processing, and the non-processing of therotor B2 cannot be realized which will invite a decrease in productionefficiency and an increase in cost

SUMMARY OF THE INVENTION

The present invention was made based on said situation, and the objectis to provide an inexpensive magnetic power generator rotor on which aclaw can be easily and reliably attached without any special workmanshipnor screw processing.

Also, this invention has the object of enabling an adequateconcentration of said magnetic flux of a magnet to the magnetic pole byincreasing the magnetic resistance of the magnetic circuit connectingthe magnetic pole to the insert core, thereby obtaining a magnetic powergenerator rotor that can improve the power generating capacity in thepower generating coil and the like.

Also, this invention has the object of obtaining a magnetic powergenerator rotor that can more adequately concentrate the magnetic fluxof a magnet on a specific magnetic pole.

Also, this invention has the object of obtaining a magnetic powergenerator rotor that can fix the magnet and magnetic pole to the insertcore reliably and inexpensively without subjecting the insert core toany machine tooling at all.

Also, this invention has the object of obtaining a magnetic powergenerator rotor that can reliably prevent a magnet from shifting out ofplace on the target surface when assembling on an insert core.

Also, this invention has the object of obtaining a magnetic powergenerator rotor that enables the easy implementation of the operationfor tightly fastening with a screw and nut a magnet and magnetic pole toan insert core.

Also, this invention has the object of obtaining a magnetic powergenerator that enables the easy installation and fixture of an insertcore of sintered alloy to a crankshaft.

Also, this invention has the object of obtaining a magnetic powergenerator rotor that can reliably implement a stoppage of the rotationof a axial hole part on a crankshaft.

This invention has the object of obtaining a magnetic power generatorrotor that enables removal from a crankshaft very easily and reliablywith a removal tool, without subjecting to an additional process such asproviding a screw hole or the like.

Also, this invention has the object of obtaining a magnetic powergenerator rotor removal tool that enables the removal of a rotor from acrankshaft in a simple operation and manipulation, even without havingsufficient work space in the periphery of the rotor.

Also this invention has the object of obtaining a magnetic powergenerator rotor removal tool that enables the removal of a rotor from acrankshaft with a simple disengaging operation for a removal perforationof a removal part.

To achieve aforementioned objects, in the magnetic power generator rotorof this invention, a nut rotation blocking hole and an insert hole forsaid male screw are provided on a part of the insert core to which arotation ratchet claw is fixed, thereby there is no need for a screwthread processing on this insert core itself latter, and said ratchetclaw can be fixed to the insert core through an axial part supporting infreely rotating manner said ratchet claw by merely fastening said nut tosaid rotation blocking hole and screwing the tip of the male screw,which had been passed through said perforation.

In addition, by forming the axial part supporting said ratchet claw in amanner enabling rotation in one body with said insert core during theformation of said insert core, it is not necessary to use a cylindricalpart forming said axial part as a part and therefore lowering of costscan be planned.

Also, the magnetic power generator rotor of this invention is providedat the pole piece part with a first pair of magnetic poles formed in onebody on the insert core and a second pair of magnetic pole made from amagnetic plate installed between said first magnetic poles and held themagnet between said insert core, so that the magnetic flux density thatis radiated outside through the second magnetic poles is increased andthe concentration of the magnetic field to such as the power generatingcoil and the like is made possible.

Also, the magnetic power generator rotor of this invention introducesthe second magnetic pole through a non-magnetic part between the firstmagnetic poles and a magnet is contained between the said insert corewith the second magnetic poles, and thus the concentration of themagnetic flux of the electro-magnet at the second magnet poles is madepossible.

Also, the magnetic power generator rotor of this invention makespossible the concentration of the magnetic flux of a magnet at thesecond magnetic poles, that is in a condition of being magneticallyinsulated from the first magnetic poles, by screwing said secondmagnetic pole on to the insert core between the first magnetic poleswith a non-magnetic screw through a magnet.

Also, the magnetic power generator rotor of this invention makes itpossible to easily fix said magnet and second magnet pole to said insertcore by tightening said screw from the outside of the second magneticpole, by joining the magnet and the second magnetic pole to the screwand nut to be fixed at the indented hole pan of the opening on the sideof the insert core.

Also, the magnetic power generator rotor of this invention makes itpossible to prevent the magnet from shifting its position to the axialand circular directions of the rotor and fixing the magnet in its properposition between first two magnetic poles by providing shift-protectingribs on the target surface of the insert core magnet so as to cover atleast the 3 sides of the bottom end of the magnet.

Also, the magnetic power generator rotor of this invention simplifiesthe screwing in operation required for the screws and nuts by making theindented hole part for the nuts the shape and size of the rotation blockfor the nut and screwing said screw into the nut from the outside of thesecond magnetic pole.

Also, the magnetic power generator rotor of this invention makes itpossible to utilize their shapes and structure capable of reducing themass by molding the insert core with a sintered magnetic alloy, tomaximize the concentration of the magnetic flux of the magnet at themagnetic poles by equalizing the length of the axial fringe direction ofthe magnet and the magnetic poles, and to ensure a firm contact of theaxial hole part with the crankshaft by making the axial hole part atapered hole.

Also, in the magnetic power generator rotor according to this invention,the forming of the key groove against the axial hole part can besimplified because the insert core can be obtained by molding of thesintered alloy, and therefore using this key groove has made it possibleto reliably block the rotation of the rotor having said insert coreagainst the crankshaft.

Also, in the magnetic power generator rotor according to this invention,the forming of the key protuberant for the axial hole part can besimplified because the insert core can be molded with the sinteredalloy, and using this key protuberant has made it possible to reliablyblock the rotation of the rotor having said insert core against thecrankshaft.

Also, with the magnetic power generator rotor of this invention astraight hole as the axial hole part can be formed simultaneously withits inside surface in a smooth condition at the time of forming theinsert core, and it has been made possible to avoid such bothersome postprocessing as surface grinding of the inside of the axial hole part asdone in the prior art.

Also, with the magnetic power generator rotor of this invention theextraction part of a removal tool for removing the rotary body from thecrankshaft is being inserted in the rotor and a multiple of perforationsfor removal purpose whose peripheral part is engaged with thisextraction part is being provided on the rotor; and therefore it ispossible to remove the rotor from the crankshaft by insertion of saidremoval tool into the perforations followed by the operation of theperipheral engagement and further by the extraction operation of theremoval tool.

Also, the magnetic power generator rotor removal tool according to thisinvention is provided with a plate positioned opposite to the magneticpower generator rotor having an axial hole in the crankshaft of theengine, a screw part screwed into the center part of said plate so as topass through the plate with the tip part touching the end of saidcrankshaft, and a multiple of extraction parts positioned so as to stopone end part from passing through said plate; therein an engagement partinserted into a multiple of perforations for removal provided in saidrotor and engaged with the peripheral part of said perforations isformed at the other end of said extraction part. Therefore, by insertingthe end part of said extraction part into the perforations for removingthe rotor and carrying out the rotation operation, the engagement partof the extraction part hitches on to the peripheral of the perforationsfor removal and further applies a direct torque generated by thescrewing-in operation of the part to the rotor and crankshaft throughsaid engagement part so that the rotor can be removed from thecrankshaft.

Also, the magnetic power generator rotor removal tool of this inventionis provided at the end of the removal part with an engagementprotuberant that can be engaged in the peripheral of the perforationsfor removing the rotor with the rotation operation. Therefore, bypulling up said extraction part in this engaged condition by screwing inthe screw part through the plate, the extraction of the rotor from thecrankshaft is made possible.

Also, the magnetic power generator rotor removal tool of this inventionis provided with an engagement protuberant part at the tip of theextraction part that can be engaged in the area of the perforations forremoving the rotor by a linear motion operation. Therefore, by pullingup said extraction part in this engaged condition by screwing in thescrew part through the plate, the extraction of the rotor from thecrankshaft is made possible.

Also, the magnetic power generator rotor removal tool of this inventionis provided with an engagement protuberant part at the tip of theextraction part that can be engaged in the area of the perforation forremoving the rotor by the rotation operation of a plate provided with anextraction part. Therefore by pulling up said extraction part in thisengaged condition by screwing in the screw part through the plate, theextraction of the rotor from the crankshaft is made possible.

BRIEF EXPLANATION OF DRAWINGS

FIG. 1 is a sectional drawing showing a partly broken down small sizeengine having a magnetic power generator rotor in accordance with theconfiguration for implementing this invention.

FIG. 2 is a sectional drawing showing an enlargement of the principalparts of the rotor in FIG. 1.

FIG. 3 is a left side view showing the principal parts of the rotor inFIG. 9.

FIG. 4 is a sectional drawing showing an enlargement of the principalparts of a magnetic power generator rotor according to anotherconfiguration for implementing this invention.

FIG. 5 is a front view showing a magnetic power generator rotoraccording to another configuration for implementing this invention.

FIG. 6 is a front view showing the insert core in FIG. 5.

FIG. 7 is a longitudinal section view of the insert core shown in FIG.6.

FIG. 8 is a dismantle deal drawing showing an enlargement of themagnetic pole and magnet in FIG. 6.

FIG. 9 is a dismantle deal drawing showing an enlargement of anotherexample of the magnetic pole and magnet in FIG. 6.

FIG. 10 is a front view showing a magnetic power generator rotoraccording to another configuration for implementing this invention.

FIG. 11 is a front view showing the insert core in FIG. 10.

FIG. 12 is a longitudinal section view of the insert core shown in FIG.11.

FIG. 13 is a front view showing a partially broken down insert coreinsert core in a magnetic power generator rotor according to anotherconfiguration for implementing this invention.

FIG. 14 is a sectional drawing showing a partially broken down insertcore in a magnetic power generator rotor according to anotherconfiguration for implementing this invention.

FIG. 15 is a front sectional view showing a magnetic power generatorrotor according to another configuration for implementing thisinvention.

FIG. 16 is a side sectional view showing the partially broken downmagnetic power generator rotor in FIG. 15

FIG. 17 is a line A--A sectional view of FIG. 13.

FIG. 18 is a line B--B sectional view of FIG. 15

FIG. 19 is a dismantle view showing the partially broken down magneticpower generator rotor in FIG. 15.

FIG. 20 is a side sectional view showing a partially broken downmagnetic power generator rotor in this invention after being ejectionformed.

FIG. 21 is a front view of the principal parts showing a magnetic powergenerator rotor according to another configuration for implementing thisinvention.

FIG. 22 is a plane view of the magnetic power generator rotor in FIG.21.

FIG. 23 is a side sectional view of the magnetic power generator rotorin FIG. 21.

FIG. 24 is a back view of the magnetic power generator rotor in FIG. 21

FIG. 25 is a line C--C sectional view of FIG. 21.

FIG. 26 is a line D--D sectional view of FIG. 21.

FIG. 27 is a front view showing a partially broken down magnetic powergenerator rotor according to another configuration for implementing thisinvention.

FIG. 28 is a longitudinal section view of the rotor shown in FIG. 27FIG. 29 is a front view showing the insert core in FIG. 27.

FIG. 30 is a dismantle view of the principal parts showing the insertcore in FIG. 27.

FIG. 31 is a longitudinal section view showing the insert core in FIG.27.

FIG. 32 is a front view of the principal parts showing another exampleof the axial hole part area in this invention.

FIG. 33 is a longitudinal section view of the axial hole part area inFIG. 32.

FIG. 34 is a front view of the principal parts shown in another exampleof the axial hole part area in this invention

FIG. 35 is a longitudinal section view of the axial hole area in FIG.34.

FIG. 36 is a front view showing a magnetic power generator rotoraccording to another configuration for implementing this invention.

FIG. 37 is a partially cut off sectional view showing a magnetic powergenerator rotor removing tool according to one configuration forimplementing this invention

FIG. 38 is a dismantle view of a principal part showing the relationbetween the perforation for removal and the extraction part in FIG. 37.

FIG. 39 is a front view showing a magnetic power generator rotoraccording to another configuration for implementing this invention.

FIG. 40 is a dismantle view of a principle part showing the relationbetween the perforation for removal and the extraction part in FIG. 39.

FIG. 41 is a sectional view of a principal part showing the condition ofengagement of the perforation for removal and an extraction part in FIG.40.

FIG. 42 is a front view showing a magnetic power generator rotor ofanother configuration for implementing this invention.

FIG. 43 is a dismantle view of a principal part showing the relationbetween the perforation for removal and an extraction part in FIG. 42

FIG. 44 is a section view of a principal part showing the condition ofengagement of the perforation for removal and an extraction part in FIG.43.

FIG. 45 is a sectional view showing a partially broken down conventionalsmall size engine.

FIG. 46 is a sectional view showing an enlargement of part of the rotorin FIG. 45.

FIG. 47 is a dismantle view showing an insert core in a conventionalmagnetic power generator rotor.

FIG. 48 is a longitudinal section view of the insert core shown in FIG.47.

FIG. 49 is a side view showing a conventional pulley removal tool.

FIG. 50 is a side view showing a conventional rotor removal tool.

DETAILED DESCRIPTION OF THE INVENTION

In FIGS. 1 and 2, identical symbols indicated previously are affixed tothe parts identical with the past examples in FIGS. 45 and 46.

In rotor A of the magnetic power generator of the configurationaccording to this implementation, a ratchet claw 7 is provided as shownin FIG. 2 to an axial part 8 having a perforation 8a as it cylindricalpart. Moreover, 10 is a male screw pushed through a perforation 23 whichis formed by a perforation 8a of said axial part 8 and an insert core 5.

Furthermore, 11 is a nut which is screwed on the end of said male screw10 and secures said axial part 8 to said insert core S. Moreover, a nut11 is located in a rotation blocking hole 24 formed in said insert core5, and blocks rotation despite the screwing in operation of said malescrew 10. FIG. 3 shows a hexagonal concave shape slightly larger thansaid nut 11.

Also, said rotation blocking hole 24 can be formed with a non magneticlayer 6 such as synthetic resin and aluminum wit lout providing aninsert core 5.

Consequently, in the rotor of a small size engine with such aconstruction, in case said ratchet claw 7 is installed on the insertcore 5, first the ratchet claw 7 is attached to said axial part 8 in afreely rotating manner, then the male screw 10 is screwed through theaxial part 8.

Next, after inserting said male screw 10 into the perforation 23 whichhas been pre-formed in the insert core 5, the nut 11 is screwed on tothe end of said male screw which is protruding out from the insert core5.

Said screwing on action can be easily and quickly effected by screwingon the male screw 10 to the nut 11, which has been installed in therotation blocking hole 24, through the axial part 8.

Therefore, according to the configuration of this embodiment, there isno need to purposely carry out the screw thread process for the malescrew in order to screw the male screw 10 on to the insert core 5, andsaid ratchet claw 7 can be easily secured.

Further according to the configuration of this embodiment, the shape ofsaid rotation blocking hole 24 is shown as being hexagonal, but it canbe any shape if the rotation blocking effect can be achieved when thenut 11 is embedded.

Next, FIG. 4 is a partial sectional view showing another configurationfor implementing this invention, and the difference with the abovedescribed embodiment is in the point that the axial part 8 supportingthe ratchet claw 7 in a free rotating manner has been formed into oneunit with the insert core 5 when forming the latter. In all otherrespects it is identical with the embodiment described above, so aduplication of explanation will be omitted.

With such a construction, the need to prepare said axial part 8 as aseparate part will disappear, and it will be possible to plan a costreduction by eliminating the number of parts used, and an improvement Inthe efficiency of assembly work.

Further, in the configuration for implementation shown in FIGS. 1through 4, an insert core 5 formed by using a tempered bonding metal ofa magnetic material was shown, but a layered magnetic plate would alsohave the same effect as that described previously.

Moreover, in said configuration for implementation, the case where aninsert core 5 is covered with a synthetic resin layer that is of anon-magnetic material and formed into a disc shape was described,however, as long as it is a non-magnetic material, anything can be used.For example, it can be covered with an aluminum die cast using aluminum.

Furthermore, said configuration for implementation explained the casewhere an insert core 5 was used with the axial hole between a pole piecepart P on one side and a counter weight part 4 on the other side,however it goes without saying that the present invention can also beapplied when the pole piece part P and the counter weight part 4 areseparated.

FIG. 5 is a front view showing a magnetic power generator rotor B3according to another configuration for implementing this invention, andin said drawing 61 is an insert core made from a magnetic sintered alloyforming an approximately I-shape as a whole, and 62 is a non-magneticmaterial layer such as a synthetic resin layer and aluminum die castlayer formed by ejection to cover the insert core 1.

Also, with said insert core 61, an axial hole part 63 is between a polepiece part 65, with a magnet 64 on one side, facing a counter weightpart 67 on the other side The said pole piece 65, as shown in FIG. 6,has a pair of approximately L-shape magnetic poles 65a projecting at oneend of an insert core 61, a concave part 65b for attachment indentedbetween said magnetic poles 65a, a pair of engagement blockingprotuberance 65 projecting from the opposite walls in said concave part65b for attachment, and a magnetic receptacle part 65d protruding fromthe bottom part of said concave part 65b for attachment.

Also, 66 is a magnetic pole formed in an approximately horseshoe shapeby a magnetic material as a whole, and as shown in FIG. 8 at both endsare installed engagement pieces 66a, which can be engaged with saidengagement blocking protuberance 65c.

Further, 64 is a magnet and when the engagement piece 66a is engagedwith said engagement blocking protuberant 65c, the magnet 64 will beheld between the bracket-shaped part of said magnetic pole 66 and thereceptacle surface of said magnetic receptacle part 65d.

In short, said magnetic pole 66 is formed independently of insert core61, and when assembling the rotor it is attached to said insert core 61,and at the point of attachment (separate part) the magnetic resistanceof the magnetic circuit will increase.

Furthermore, said magnetic pole 66 and the magnet 64 form one part ofsaid pole piece 65, and the magnet pole 66 comes close to a powergenerating coil and ignition coil which are not shown in the drawingsand functions to generate voltage.

An insert core 61 having, a pole piece part 65 and a counter weight part67 as shown in FIGS. 6 and 7, is positioned in a metal mold that is notshown in the drawing and each part excluding the axial hole part 63 isejection formed, or aluminum die cast formed, and a disc shape rotorcoated with a non-magnetic material layer 62 as shown in FIG. 5 isformed.

Also, 68 is a cooling fan formed simultaneously when enjection formingor aluminum die cast forming said synthetic resin and protrudes in anideal shape to carry out the cooling of the internal combustion engine.

Also, the axial line directional Z length of said magnet 64 is equalwith the magnet 65a and 66; therefore, the magnetic flux of the magnet64 is concentrated in magnetic pole 66 and can affect the ignition coiland power venerating coil, that are not shown in the drawing, with highefficiency.

Also, said counter weight part 67 has the necessary and sufficientweight to match the weight of said pole piece part 65 and is designed toimprove the inertial moment of the insert core 61, and is formed in anapproximately arc shape as a whole.

The insert core 61 having the axial hole part 63, the pole piece part 65and the counter weight part 67 is formed by a magnetic piece made from asintered alloy as one unit using one metal mold as described previously.

Also, said axial hole part 63 is a tapered hole whose inside diameterchanges in the direction of the axial fringe as described previously.Because this tapered hole is formed by the metal mold simultaneouslywhen forming said insert core 61, it becomes possible to smoothly finishthe inside surface.

For this reason, when installing a rotor B3, having such a tapered holeas the axial hole part 63, under pressure on the crankshaft 14 of theinternal combustion engine, a part of the tapered hole will be in tightcontact with the outer surface of the crankshaft 14. For this reasonsaid rotor can be accurately attached to is designated position on thecrankshaft.

Also, the outer surface part of each of said magnetic poles 65a and 66is slightly exposed outside of said non-magnetic material layer, andthus is able to efficiently supply the magnetic flux of the magnet 64 tothe power generating coil and the ignition coil. Consequently, it ispossible to increase the power generating efficiency of each of thesecoils.

A magnetic power generator rotor B3 with such a construction is attachedto the crankshaft 14 of an internal combustion engine and rotates asdescribed above and adequately affects the magnetic flux from themagnetic pole 66 on to the power generating coil and ignition coilpositioned in the area of the rotor B3 and generates an induced power ofa pulse form in each of these coils.

In this case, said magnetic pole 66 is formed into one unit with themagnet 64 which is installed in the magnetic receptacle part 65d of theinsert core 61 by its engagement piece 66a.

For this reason, the magnetic resistance of the magnetic circuit at thepart of engagement of this engagement piece 66a and the engagementblocking protuberant 65 that blocks the engagement becomes great. Inshort, the shortage part of the magnetic circuit can be lowered andvirtually all of the magnetic flux generated by the magnet 64engagement, and thus it is possible for the magnetic flux passingthrough this magnetic pole 66 to adequately affect said coils. As aresult, it is possible to drastically improve the power generatingcapability of each coil.

Moreover, in order to further reduce the shortage part in the magneticcircuit it is also possible to narrowly control the start up piece 66bof the magnetic pole 66 covering the side of said magnet 64 as shown inFIG. 9.

FIG. 10 is a rotor showing another configuration for implementing thisinvention, and the insert core forming this rotor, as shown in FIG. 11,blocks a multiple layered magnetic plate with a rivet 72 and is composedof layers.

Even in this configuration of embodiment, excluding the axial hole part73, said insert core 71 is formed in a disc shape covered by anon-magnetic layer 79 and the axial hole part 73 is between a pole piecepart 75 having a magnet 74 on one side and a counter weight 76 on theopposite side.

Said pole piece part 75 has, as shown in FIGS. 11 and 12, a pair ofapproximately L shape magnetic poles 75a protruding at one end of aninsert core 71, a concave part 75b for attachment indented between eachof said magnetic poles 75a, an engagement blocking protuberant 75cprojecting from a pair of walls facing each other in said concave part75b for attachment, and a magnet receptacle part 75d projecting from thebottom of said concave part 75b for attachment.

Also, 77 is a magnetic pole formed in an approximately horseshoe shapeby a magnetic plate, and at both ends, as shown in FIG. 7, an engagementpiece 77a, which can be engaged with said engagement blockingprotuberant 75c, is provided.

74 is said magnet, which is secured between the bracket-shaped part ofsaid magnetic pole 77 and the receptive surface of said magnet receivingpart 75d at the time of engaging the engagement piece 77a with saidengagement blocking protuberant 75c 78 is a fan used for feeding air,and 79 is a non-magnetic material layer.

Further, said magnetic pole 77 and magnet 74 also comprise a part ofsaid pole piece part 75, and magnetic pole 77 approaches near a powergenerating coil and an ignition coil which are not shown in the drawingand forms a magnetic circuit for generating voltage.

In this configuration of embodiment, the axial line directional Z lengthof the magnetic pole 77 and the magnet 74 are equal, and moreover isgreater than the thickness of the insert core 71, therefore it ispossible for the highly dense flux generated by magnet 74 to adequatelyaffect said power generating coil and the like through magnetic pole 77having a weak magnetic resistance (the mutual contact area is equal).

FIG. 13 shows another configuration for implementing this invention. Insaid drawing, 81 is an insert core made from sintered alloy ofnon-magnetic material or a layered magnetic plate. In this insert core81, 82 is an axial hole part such as a tapered hole or straight hole andthe like, 83a is a pair of L shape magnetic poles provided at one end ofinsert core 81, and 83b is a concave part for attachment formed betweeneach of the magnet poles 83a.

Also, 83a is a cut off part formed on the facing walls of the concavepart 83b for attachment, 84 is a horseshoe shape magnetic pole supportedby said facing walls 83b in such a manner that the engagement pieces 84aat both ends seem to be biting into the non-magnetic part 83d providedin the cut off part 83a and which is made of magnetic plates.

Also, 85 is a magnet which is held between said magnetic pole 84 and thebottom part of said concave part for attachment 83b. Magnetic poles 83a,84 and magnet 85 form the pole piece part.

The insert core 8 I comprised thus is identical with each of saidconfigurations for embodiment, and over these are provided anon-magnetic layer by ejection forming of synthetic resin or aluminumdie casting to prepare a disc shape rotor.

In this configuration of embodiment, by providing a non-magnetic part83d, such as that described previously between the magnetic pole 84 andthe magnetic pole 83a, the magnetic resistance at the engagementblocking part (connecting part) becomes very strong.

Consequently, the flow of magnetic flux from the magnetic pole 84 to themagnetic pole 83a is reduced. In short, the shortage part of themagnetic circuit becomes small and it becomes possible for much of theflux from magnet 85 to pass through magnetic pole 84 and be adequatelyconcentrated in such as the power generating coil and the like.

FIG. 14 shows a configuration of another embodiment of this invention.This configuration of embodiment places a magnet 94 and a magnetic pole95 of about the same size on top of one another in order at the bottompart of the concave part for attachment 93b formed between a pair of Lshaped magnetic poles 93a, and by screwing these to the bottom of saidbottom part with a non-magnetic material screw 96, made of such asstainless steel and the like fixes the magnet 94 and the magnetic pole95 to the insert core 91.

This configuration of embodiment is able to virtually avoid magneticshortages in the magnetic pole 95 and the insert core 91 because themagnetic pole 95 is attached to the insert core 91 through anon-magnetic screw 96 As a result, the magnetic flux from the magneticpole 95 can be adequately concentrated in the power generating coil andthe like, and can achieve the original excellent power generatingcapacity FIGS. 15 through 20 show a magnetic power generator rotor B4according to another configuration for implementing this invention. 101is an insert core and is comprised of the pole piece part 104 and thecounter weight part 105 that have the axial hole part 102 between themand secure the magnet 103.

Also, 106 is the first pair of magnetic poles formed as one unit withsaid insert core 101, and 107 is the second pair of magnetic poles madeof a magnetic material and fixed between said first pair of magneticpoles 106 through said magnet 103 by a non-magnetic screw (bolt) 108 anda nut 109, and is press formed.

Furthermore, 110 are ribs for preventing a shift in position provided onthe attachment surface of said magnet 103 so as to bring said magnet 103between the ribs, 111 are concave hole parts engaging said screw 108,and 112 is a concave hole part that is wider than said concave holeparts 111. These are also open at the other side of the insert core 101.

113 was formed by carrying out such as ejection forming into disc shapeon the assembled insert core 101, and is for example a synthetic resinlayer of non-magnetic material as shown in FIG. 20.

Next, the procedure for assembling said insert core 101 will bedescribed. First, said insert core 101 is formed with a powder such asfor example iron oxide that is a magnetic material using a metal moldwith a pole piece part 104 having the first pair of magnetic poles 106as shown in the drawing, the concave parts 111 and 112 as shown in FIG.195 for installing a screw 108 and a nut 109, the ribs 110 forpreventing a shift in the position of the magnets provided between saidfirst pair of magnetic poles 106, and for example a tapered axial holepart 102, and a balance weight 105 on the other side of said axial hole102.

Also, at about the center between said magnet 103 and the second pair ofmagnetic poles 107 perforations 103a and 107a are provided. Said screw108 is inserted into these perforations 103a and 107a and a nut 109 isattached to a suitable position on said screw 108.

To the insert core 101 are installed from the side using a fising tool,the assembled unit of said magnet 103 and the second pair of magneticpoles 107 provided with said screw 108 and nut 109 so as to place themagnet 103 between the ribs 110 for prevention of a shifting in positionprovided between the first pair of magnetic poles 106 in the pole piecepart 104 of said insert core 101; and also the screw 108 is installed soas to be placed in the concave hole part 111 and the nut 109 in theconcave hole part 112.

Next, said magnet 103 and the second pair of magnetic poles 107installed with said fixing tool is to be secured but in the case of thisinvention these can be tightened and fixed by simply turning said screw108 in a tightening direction against the nut 109 that is restrictedfrom turning by the concave hole part 112.

That is, because the concave hole part 112 that fits in said nut 109provided in said insert core 101 is, as shown in FIGS. 16 and 17, a holethat has been made only slightly larger than the opposing aforementionednut 109. The opposing part of the nut 109 comes in contact with the wallof said concave hole part 112 and even when the screw 108 is tightenedsaid nut 109 itself does not rotate.

On one hand, because the concave hole part 111, in which said screw 10Sfits into, has a clearance for said 108 to smoothly rotate in as shownin FIG. 18, no difficulty whatsoever occurs in the tightened fixture ofsaid magnet 103 and the like.

Furthermore, if the position of said concave hole part 112 is located ina place away from the magnetic field of said magnet 10)3, a magneticbody can be used. Also, said axial hole part 102 was made a tapered holefor easy release of the mold when forming, but it can also be a straighthole.

Next, the assembled insert core 101 including such as said magnet 103and the magnetic poles 107, is set up to expose a part of the outer-mostpart of the first pair of magnetic poles 106 and the second pair ofmagnetic poles 107 of the insert core 101 to the metal mold for ejectionmolding use which is a non-magnetic material such as for examplesynthetic resin, and the outer shape is formed into a disc shape asshown in FIG. 20 by the ejection forming of the synthetic resin. Therotor is completed in this way.

Further, depending on needs, the provision of a cooling fan for enginecooling to said disc shape rotor is optional.

Generally, a pre-magnetized magnet is used for said magnet 103 butdepending on the case, there are times when a magnetic body that has notbeen magnetized is used. In such case, the magnetic body can bemagnetized into a magnet after said ejection forming.

Also, in said configuration of embodiment, a case carrying out ejectionmolding with synthetic resin, which is a non-magnetic body, was shown,but ejection molding with such as the conventional aluminum die cast canbe carried without being restricted to synthetic resin to achieve thesame results as that in said configuration of embodiment.

FIGS. 21 through 26 show another configuration of the magnet 103 and themagnetic poles 107. In this configuration of embodiment, the ribs 113for preventing a slip in position have been provided to prevent thebottom part of said magnet 103 from shifting in the direction of thethrust (one thrust direction in this configuration of embodiment) and inthe direction of intersection.

Also, in this configuration of embodiment, on one side of said ribs 115for preventing a shift in position in the thrust direction and theinsert core 101, as shown in FIGS. 23 and 25, a concave hole part 116has been provided enabling the insertion of a screw 108 attached to saidmagnet 103.

On one hand on the other side of said insert core 101, as shown in FIGS.24 and 26, there is provided a concave hole part 117 enabling said nut109 to be inserted from the other side and a concave hole part 118 inwhich the bottom end of said screw 108 is seated.

In this configuration of embodiment, first the nut 109 is inserted insaid concave hole part 117 from said other side of the insert core 101,next the screw 108, which has been passed through said magnet 103 andthe second magnet poles 107, is screwed in from said one side, then atthis time the end of the screw 108 is screwed into the nut 109.

Subsequently, with said second magnetic poles 107 in the condition ofbeing positioned in the ribs 11 S for preventing a shift in position, byscrewing said screw 108 into said nut 109 with a tool, said magnet 103can be fixed firmly in the insert core 101 without resulting in a shiftof position.

In other words, in this configuration of embodiment, the ribs 115 forpreventing a shift in position, which have been provided at theestablished position for the insert core 101 of the magnet 103, can beeasily prevented from shifting in either the from, back, left or rightdirection when assembling the magnet 103 with the screw 108 and the nut109 without using an engagement tool. Therefore, the magnet 103 and thesecond magnetic poles 107 will be safely secured in their establishedpositions even after assembling.

FIGS. 27 and 28 show another configuration of embodiment of a magneticpower generator rotor B5, and 121 is an insert core having anapproximately H shape as a whole, and 122 is a non-magnetic materiallayer made of synthetic resin, aluminum die cast and the like which hasbeen ejection molded in disc shape so as to cover the insert core 121.

Also, said insert core 121 has on one side a pole piece 124 having amagnet 126 and on the other opposite side a counter weight 125 with anaxial hole part 123 between them.

Of these, as shown in detail in FIGS. 29 30 and 31, the pole piece 124is comprised of the L shape magnetic poles 124b protruding from bothends of a 1 shape magnetic pole piece 124a; the magnetic poles 124d asmagnetic material (plates) supported by the supporting column 124cerected as one unit on said magnetic pole piece 124a; and the magnet 126provided in an open hole 121 a formed between the magnetic piece 124a,the supporting column 124c and the magnetic pole 124d.

Here, this magnet 126 is equal in axial line directional length witheach of the magnetic poles 124b and 124d, therefore the magnetic fluxfrom magnet 126 is concentrated in magnetic pole 124d and veryefficiently affects an ignition coil and an power generating coil whichare not shown in the drawing.

Also, said counter weight part 125 has the necessary and adequate weightto match the weight of said pole piece part 124, and is designed toimprove the inertial moment against the insert core 121, and overall isof an approximately arc shape.

The insert core having the axial hole part 123, the pole piece part 124and the counter weight part 125 is formed as one unit using one metalmold with a magnetic body made from sineered alloy. Consequently, theshape and size of this insert core 121 can be optionally selected, andthe weight and production cost can be lowered in comparison toconventional layered insert cores tapered hole with its diameterchanging in the axial line direction and because this tapered hole isformed by the metal mold simultaneously with the fonTilnu of said insertcore, it is possible to finish the inside surface smoothly.

For this reason, a part of the tapered hole part of the rotor havingsuch a tapered hole as the axial hole part 123 w 11 fit tightly so as tobite into the outer surface of the crankshaft when installing on thecrankshaft of an internal combustion engine. Consequently, said rotorcan be accurately installed in the established position on thecrankshaft.

An insert core 121 such as shown in FIGS. 29 through 31 is positionedwith a metal mold that is not shown in the drawing, and each partexcluding the axial hole part 123 is ejection formed with syntheticresin, or formed by aluminum die casting, and coated with a non-magneticmaterial layer 122 such as shown in FIGS. 97 and 28, to form a discshape rotor.

Also, a multiple of cooling fans 127 are formed as one unit on one sideof this disc shape non-magnetic material layer 122. These cooling fans127 provide ventilation with the rotation of such a rotor, and is usedfor cooling the engine.

Also, the outer surface part of said magnetic poles 124b and 124d areslightly exposed on the outside of said non-magnetic material layer 122,and thus can efficiently supply the magnetic flux from the magnet to thepower generating coil and the ignition coil and the like. Consequently,it is possible to raise the power generating efficiency of each of thesecoils.

Also, the axial hole part 123 provided at the center part of an insertcore 121 such as described above has a tapered hole, but as shown inFIGS. 32 and 33 by forming as one unit a key groove 128 in the axialdirection in the axial hole part 123 when forming said insert core 121,the rotation block on the crankshaft of the rotor can be made reliablewhen fitting to the key protuberant pre-formed on the crankshaft.

Further, in case a key protuberant cannot be provided on the crankshaftitself, by inserting a piece in the key groove 128 the rotation blockfor the rotor against said crankshaft can be reliably accomplished.

Also, as shown in FIGS. 34 and 35, by providing the key protuberant 129as one unit in the axial direction in said axial hole part 123 at thetime of said forming, the blocking of rotation of the rotor on thecrankshaft can be reliably accomplished when fitted to the key groovepre-formed on the crankshaft.

Further, said key groove 128 and key protuberant 129 can be formedsimultaneously with the forming of the crankshaft, therefore theprocessing steps for the rotor will not increase for the purpose offomliing said groove and protuberant. In short, the need to implement aseparate step for processing the key groove 128 and the key protuberant129 after forming the axial hole part 123 will be eliminated, and alsothe need to prepare separate key parts will be eliminated, and it willbe advantageous from operational and economical points.

FIG. 36 shows a rotor B6 according to another configuration ofembodiment of this invention, which has an axial hole 132 at its centerpart for fitting, with the engine crankshaft. This axial hole 132 isformed in a tapered shape as needed.

Said rotor has in opposing positions (opposing positions of 180 degreesto each other) a pole piece part (not shown in the drawing) consistingof a magnet and magnetic poles and a counter weight (not shown in thedrawing) with the axial hole 132 between them. Also, 133 is multiplelocations of said rotor B6, and here they are perforations for removalthat have been formed in 2 places. These removal perforations 133consist of a perforation 133a through which a rod shape extraction partthat is part of the removal tool described later on can be passedthrough, and a pin perforation hole 133b through which an engagement pinconnected to said extraction part as a continuation of the through hole133a. Moreover, 133c are cooling fans placed apart at equal distances.

FIG. 37 shows said removal tool and the removal structure for removingsaid rotor B6 from the crankshaft In said drawing 135 is the crankshaftfitted to said axial hole 132 of the rotor 131.

A nut 136 is fitted tightly on a male screw 135a at the tip of thecrankshaft 135, and the rotor B6 is fixed so that it will not easilycome off of crankshaft 135. Further this nut 136 can be removed at thetime of the above mentioned removal operation.

Also, 137 is for example a disc shape plate comprising a support forremoval tool H, and at the center of this plate 137 is screwed in ascrew part 138 such as a bolt whose tip is in contact with the end partof said crankshaft 135, and furthermore perforated holes 139 have beenprovided in a multiple of locations on this plate 137.

140 is an extraction part of said removal tool H passed through theseperforated holes 139, and a head part 141 for blocking removal has beenprovided at one end and at the other end an engagement pin 142 has beenprovided as an engagement part.

Furthermore, the diameter of said other end part of the removal part 40is slightly smaller than the perforated hole 133a of the removalperforation 133 shown in FIG. 1, and the engagement pin 142 has a lengthfreely enabling a through passage through said pin perforation hole133b, and in the area other than this pin perforation 133b, extendsoutside of the diameter o the perforation hole 133a.

Consequently, in a rotor removal tool H with such a structure whenremoving a rotor B6 from a crankshaft 135, said other end of eachremoval part 140 is first inserted in the A direction of the arrow inremoval perforation 133 as shown in FIG. 38.

This insertion is accomplished by inserting the extraction part 140itself into the perforation 133a and the engagement pin 142 intoperforation 133a of said removal perforations 133.

Next, after insertion, each removal part 14 per se is rotated at forexample 90 degrees in the B direction of the arrow at said perforation13. As a result, each engagement pin 14 reaches the perforation 133aarea behind the rotor B6, and when said screw part 138 is screwed intothe plate 137 under such condition, the engagement pin 142 will come incontact with the rear surface of the rotor B6 in the perforation 143aarea.

Also, with the screwing in of this screw part 138, after the tip hitsthe end surface of said crankshaft 135, the plate 137 will move in theopposite direction (midright side in FIG. 37) to the crankshaft 135.

For this reason, the engagement pin 142 at the end of said extractionpart 140 that is blocked on the plate 137 is turned in the extractiondirection (mid-right side of FIG. 37) from the rear side of the rotorB6, and this rotor B6 is subject to a strong pulling torque and issmoothly removed from the crankshaft 135.

FIGS. 39 and 40 show another configuration for implementing thisinvention. In this configuration of embodiment, a multiple (2 here) ofrectangular removal perforations 145 are formed on rotor B), and againstthe removal perforations 145 there are the insertion hook parts 147 asengagement parts of the end of extraction part 146 attached to the plate7 along the surface of the plate so as to be moveable in a direct line.

Consequently, in this configuration of embodiment, after inserting thehook part 147 of the end of the extraction part 146 into the perforation145 in the C direction of the arrow similarly as described above, bymoving the extraction part 146 on said plate 147 in a direct line towardthe D direction of the arrow as shown in FIG. 5, the hook part 147 canbe positioned behind the rotor B6 as shown in FIG. 41. Subsequently, byscrewing in the screw part 138, the removal of said rotor B6 can becarried out similarly as described above.

FIGS. 42 and 43 show another configuration for implementing thisinvention. In this configuration of embodiment, a multiple (2 here) of Lshape removal perforations 148 are formed on the rotor B6, and for theseremoval perforations 148 the hook part 150 as an engagement part of theend of extraction part 149 attached to the plate 1.37 is madeinsertable.

Further said removal perforations 148 are comprised of the circumferencedirected hole 148a along the direction of the circumference of the rotorB6, and the diameter directed hole 148 extending in the direction of theradius of the rotor B6.

Consequently, in this configuration of embodiment, similar to that shownin FIG. 37, after inserting the hook part 150 of the extraction part 149supported on the plate 137 in the E direction of the arrow to thediameter directed hole 148 of the removal perforation 148, said plate137 is turned in the F direction of the arrow for only a few degrees.

By doing this, after positioning said hook part 150 behind the rotor B6in the area of said circumference directed hole 148a, by screwing insaid screw part 138 as shown in FIG. 44, the hook part 150 can beblocked behind the rotor B6, and by continuing to screw in the screwpart 138 the removal of the rotor B6 can be carried out similarly asdescribed above.

Further, in this case, by moving horizontally after inserting theextraction part 149 itself in the diameter directed hold 148b withoutturning said plate 137, the hook part 150 can be positioned behind therotor B6, therefore as described above the removal of rotor B6 can becarried out.

Furthermore, without being restricted to the hooks 147 and 150 providedat the ends of said extraction parts 146, and 149 and by using all otherprotuberance instead, it goes without saying that the extraction of therotor B6 can be carried out as described above.

We claim:
 1. A magneto electric generator rotor comprising:a core madeof magnetic materials; the core including a pair of first magnetic polesformed integrally with the core, the magnetic poles being spaced fromone another; a magnet mounted on said core between the pair of firstmagnetic poles; and a second magnetic pole that is formed of a separatepiece of magnetic material attached to the core so as to hold the magneton the core; wherein non-magnetic members are provided between saidsecond magnetic pole and said core.
 2. The magneto electric generatorrotor of claim 1, wherein the rotor comprises an axially extendingcentral hole that extends axially through the rotor and at least twoholes circumferentially spaced about the central hole and extendingaxially through the rotor.
 3. The magneto electric generator rotor ofclaim 2, wherein the at least two holes comprise non-cylindricalopenings to receive an extraction tool.
 4. The magneto electricgenerator rotor of claim 2, wherein the at least two holes comprisenon-cylindrical holes.
 5. The magneto electric generator rotor of claim2, wherein the at least two holes comprise rectangular perforations. 6.A magneto electric generator rotor comprising:an insert core made of amagnetic material having an axis and two ends spaced about the axis, theinsert core comprising a pole piece at one end and a counter weight atthe other end; a non-magnetic layer molded in a disk shape so as tocover said insert core; and a ratchet claw attached to said insert core;wherein the pole piece comprises a pair of first magnetic polesintegrally formed with the core and spaced from one another and a magnetmounted on said core between the pair of first magnetic poles, and asecond magnetic pole that is formed of a separate piece of magneticmaterial attached to the core so as to hold the magnet on the core. 7.The magneto electric generator rotor of claim 6, wherein non-magneticmembers are provided between said second magnetic pole and said core. 8.The magneto electric generator rotor of claim 6, wherein the rotorcomprises an axially extending central hole that extends axially throughthe rotor and at least two holes circumferentially space about thecentral hole and extending axially through the rotor.
 9. The magnetoelectric generator rotor of claim 8, wherein the at least two holescomprise non-cylindrical removal perforations adapted to receive anextraction tool.
 10. The magneto electric generator rotor of claim 8,wherein the at least two holes comprise non-cylindrical holes.
 11. Themagneto electric generator rotor of claim 8, wherein the at least twoholes comprise rectangular perforations.